/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package vn.edu.fpt.xml.hrm.controller.auth;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;


import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import org.apache.avalon.framework.logger.ConsoleLogger;
import org.apache.avalon.framework.logger.Logger;
import org.apache.fop.apps.Driver;
import org.xml.sax.InputSource;
import org.apache.fop.apps.XSLTInputHandler;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import vn.edu.fpt.xml.hrm.common.FormatUtil;

/**
 *
 * @author ANHNH8
 */
public class TestCombinePDF extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        try {
            String path = getServletContext().getRealPath("/");
            String xslPath = path + "WEB-INF/payrollFO.xsl";
            String xmlPath = path + "WEB-INF/payrollPDF.xml";
            int empId = 0;
            String year = request.getParameter("year");
            String month = request.getParameter("month");
//            if (!"admin".equals(request.getSession().getAttribute(("ROLE")))
//                    && request.getSession().getAttribute(("EMPLOYEEID")) != null) {
//                empId = Integer.parseInt((String) request.getSession().getAttribute(("EMPLOYEEID")));
//            }
            if (!"admin".equals(request.getSession().getAttribute(("ROLE"))) &&
             request.getSession().getAttribute(("EMPLOYEEID")) != null){
                empId = Integer.parseInt((String) request.getSession().getAttribute("EMPLOYEEID"));
            }

            LoginObjJDBC.createXMLPayroll(xmlPath, 
                    //FormatUtil.dateToDate(FormatUtil.stringToDate(year, month, "1")),
                    FormatUtil.dateToDate(FormatUtil.stringToDate(year, month, "1")),
                    FormatUtil.dateToDate(FormatUtil.stringToDate(year, Integer.parseInt(month)+1+"", "1")));

            String foPath = path + "WEB-INF/payrollFO.fo";
            methodTrAX(xslPath, xmlPath, foPath);
            File file = new File(foPath);
            FileInputStream input = new FileInputStream(file);

            

            ByteArrayOutputStream out = new ByteArrayOutputStream();
            response.setContentType("application/pdf");
            Driver driver = new Driver(new InputSource(input), out);
            Logger log = new ConsoleLogger(ConsoleLogger.LEVEL_WARN);
            driver.setRenderer(Driver.RENDER_PDF);
            driver.run();
            byte[] content = out.toByteArray();
            response.setContentLength(content.length);
            response.getOutputStream().write(content);
            response.getOutputStream().flush();


        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void methodTrAX(String xslPath, String xmlPath, String output) {
        try {
            TransformerFactory tf = TransformerFactory.newInstance();
            StreamSource xsltFile = new StreamSource(xslPath);
            Transformer trans = tf.newTransformer(xsltFile);
            StreamSource xmlFile = new StreamSource(xmlPath);
            StreamResult htmlFile = new StreamResult(new FileOutputStream(output));
            trans.transform(xmlFile, htmlFile);

        } catch (TransformerConfigurationException ex) {
            ex.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
